Create default mesh protocol file if needed

src/freedombone-mesh-batman

 
     systemctl restart nginx
 
+    if [ ! -f $MESH_DEFAULT_PROTOCOL ]; then
+        echo 'bmx7' > $MESH_DEFAULT_PROTOCOL
+    fi
+
     if grep -q "bmx6" $MESH_DEFAULT_PROTOCOL; then
         systemctl restart bmx6
     else